用于低能小动物单光子发射计算机断层扫描的厚硅双面条型探测器。
Thick Silicon Double-Sided Strip Detectors for Low-Energy Small-Animal SPECT.
作者信息
Shokouhi Sepideh, McDonald Benjamin S, Durko Heather L, Fritz Mark A, Furenlid Lars R, Peterson Todd E
机构信息
Institute of Imaging Science, Vanderbilt University, Nashville, TN 37232-2310 USA.
出版信息
IEEE Trans Nucl Sci. 2009 Jun 1;56(3):557-564. doi: 10.1109/TNS.2009.2019106.
This work presents characterization studies of thick silicon double-sided strip detectors for a high-resolution small-animal SPECT. The dimension of these detectors is 60.4 mm × 60.4 mm × 1 mm. There are 1024 strips on each side that give the coordinates of the photon interaction, with each strip processed by a separate ASIC channel. Our measurement shows that intrinsic spatial resolution equivalent to the 59 μm strip pitch is attainable. Good trigger uniformity can be achieved by proper setting of a 4-bit DAC in each ASIC channel to remove trigger threshold variations. This is particularly important for triggering at low energies. The thick silicon DSSD (Double-sided strip detector) shows high potential for small-animal SPECT.
这项工作展示了用于高分辨率小动物单光子发射计算机断层扫描（SPECT）的厚硅双面条型探测器的特性研究。这些探测器的尺寸为60.4毫米×60.4毫米×1毫米。每一面有1024个条带，可给出光子相互作用的坐标，每个条带由一个单独的专用集成电路（ASIC）通道进行处理。我们的测量表明，能够实现与59微米条带间距相当的固有空间分辨率。通过在每个ASIC通道中适当设置一个4位数字模拟转换器（DAC）以消除触发阈值变化，可以实现良好的触发均匀性。这对于低能量触发尤为重要。厚硅双面条型探测器在小动物SPECT方面显示出很高的潜力。
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